Sulky-plow.



6 SHEETS-SHEET 1.

PATENTED MAY 28, 1907.

No. 864,821. I

s. GRAHAM. SULKY PLOW.

APPLICATION FIL ED JUNE 19, 1906.

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SULKY PLOW APPLICATION FILED JUNE 10. 1900.

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- W. S. GRAHAM.

SULKY PLOW. APPLICATION FILED JUN}! 10. 190a.

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PATENTED MAY 28, 1907.

. W. S. GRAHAM.

SULKY PLOW.

APPLICATION FILED JUNE 1a, 1906.

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PATEN'TBD MAY 28 1907.

W. S. GRAHAM.

SULKY PLOW.

API 'LIOATIOH FILED Jun 1900.

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UNITED sTATEs PATENT OFFICE.

WILLIAM s. GRAHAM, OF cANToN, ILLINOIS.

SULKY -PLOW.

To all whom it may concern} Be it known that 1, WILLIAM S. GRAHAM, aresident of the city of Canton, county of Fulton, and State of Illinois,have invented certain new and useful Improvements in Sulky- Flows, ofwhich the following is a specifica tron.

The principal object of this invention is to provide improved andsimplified means for tilting the plow beam in raising and lowering sothat the point will incline upward as the plow is raised and downward asit is lowered; and a secondary object is to improve the beam-lifting,lowering and locking mechanism.

In the drawings forming part of this specification Figure 1 is a plan ofa plow embodying my improvements, the elements not intimately connectedwith the invention being shown in broken lines. Figs. 2, 3, 4 and 5 arediagrams in elevation, showing parts in section and illustrating therising and lowering movements of the plow. Figs. 6 and 7 are details inelevation of the means employed to raise and lower the plow, Fig. 6showing the parts in a plow-depressing position and Fig. 7 showing theparts in the position they occupy when the plow is raised.

The plow 2 is secured to a suitable beam 1, and a bearing bracket 3 onthe plow beam is journaled on the swinging bail 4. Bars 5 and 6constitute the principal parts of the plow frame and the pivot ends ofthe bail 4 are j ournaled in brackets attached to the said bars. Therear ends of the frame bars approach each other somewhat closely andextend parallel with each other for a short distance, and a casting 7 issecured between the p arallel extensions of the b ars. The front end ofthe casting 7 is slotted to receive a fixed extension 8 of the plow beamand a roller 12, I

journaled in the slot of the casting, provides a bearing for theundersurface 9 of the beam extension. A tilt-dog 13 is pivoted at 14 inthe slot of casting 7, behind roller 12 and it has an elongated notchinthe front part of its swinging end which forms the rest-shoul-' der 15and the hook extension 16. A spring 18 acts on a downward extension ofthe tiltdog to hold the upper end of the dog swung forward. The beamextension 8 is slotted vertically in its rear end to admit the tilt-dogA 13, a pin traverses the slot of the beam extension in position toengage the rest-shoulder of the hook 16 of the tilt-dog when theconditions are as shown in Fig. 5.

Specification of Letters Patent. Application filed June 19,1906. SerialNo. 322,489-

IPatenteol may 28,1907.

An arm 19 is attached to thebail 4 and a toggle joint consisting ofmembers20 and 21 connects with the extended end-of arm 19. The togglemember21 is journaled in the pivot bearing 24, shown by a broken line inFigs. 6 and 7, and saidpivotbearingisformed in the bracket 35, which isattached to frame bar 6. An extension 22 of toggle member 21 extendsover toggle member 20 and a set screw 23 in extension 22 acts as astop-for the toggle when the members are in line, or approximately so,as shown in Fig. 6. A foot lever 26 is pivoted on an extension of togglemember 21 and a slot 27 through the inner end of the lever 26 fitsloosely over the pivot of arm 21. A catch 28proj'ects from the footlever 26 in position to engage a stop 30 on bracket when the plow israised; see Figs. 4 and 7. A swivel post 32projects laterally frombracket 35, below bar 6', a rod 31 extends through the swivel post andconnects pivotally at its u per end with a lug 29 on the slotted end ofthe foot lever 26 and a spring 33 is placed on the rod between theswivel post and a shoulder on the upper end of the rod. A I

'An auxiliary foot lever 34 is rigid with toggle joint member 21 and aspring 36, shown in broken lines in Fig. 1, is used to more or lesscompletely balance the weight of the plow. I

I When the plow is in operation the conditions are as shown in Fig. 2,or approximately so. In raising the plow, the bail 4 is swung upward, asshown in Fig. 3 lifting the front part of the beam almost directlyupward, during the earlier part of the movement, and forcing theextension 8 to ridea slight distance upward and backward on roller 1.2,This lift of the front part of the beam, while the rear part iscomparatively stationary, gives the plow the inclination shown in Fig. 3and causes it to run readily out of the ground. After the plow hasreached the position shown in Fig. 3, farther upward swing of the bailwill carry the plow rearward sufiiciently to run the extension 8 up theroller fast enough to raise the rear part of thebeam approximiately asfast as the bail raises the front part, and when the plow is entirelyraised the conditions are about as shown in Fig. 4. 1

As the inclined under surface of the beam extension rides upward andrearward on roller 12, the pin 10 forces the tilt-dog backward, againstthe action of spring 18, and

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when the plow is raised the dog is inclined backward and the pin 10 ofthe beam extension rests in the elongated notch, all as shown in Fig.4.. As the plow is lowered, the pin 10 catches on the shoulder of thedog and, resting thereon, is carried forward with the swing of the dogwhile the bail is lowering the front part of the beam. This gives thepoint of the plow a downward inclination, as shown in Fig. 5, and causesthe plow to readily enter the ground.

When the plow reaches the position shown in Fig. 5, or thereabout, theend 17 of the hook 16 of the dog, engages the stop-lip 11 of the beamextension and farther downward motion of the plow carries the pin 10gradually off the shoulder 15, permitting the rear end of the beam todrop to the position shown in Fig. 2, as the bail completes its downwardswing. The stop lip 17 is farther from the pivot of the tilt dog than isthe pin 10 and so the circumferential motion of the swinging end of thedog is delayed, as compared with the motion of the pin, and the pineventually rides off the rest shoulder 15.

Apart from forming the stop extension 17 as above described, the hook 16of the tiltdog 13 is useful in preventing an excessive upward -movementof the rear end of the frame when, in operation or on exhibition, anunusual weight or force happens to be applied to the front end of theframe tending to force it downward. This is effected by the engagementof the pin 10 with the upper portion of the hook 16, permitting the rearend of the plow itself to rise a certain distance but holding it againstfurther upward movement when downward pressure happens to be applied tothe front end of the plow beam.

When the plow beam is lowered the toggle joint should form a dead centerlock, or a close approach to one, so as to hold the plow in the ground.The weight of the plow is partly sustained by the toggle, the pulllengthwise of the toggle prevents the maintenance in the toggle of anangle beyond a dead center and the jar and wabble of the plow tends todisarrange the lock of the tog gle joint; permitting the plow to rise. Icounteract this tendency, and provide a spring-actuated catch to holdthe plow raised, by means of the details of construction, set forth moreparticularly in Figs. 6 and 7.

The foot lever 26 is pivotally connected with the extension of member 21of the toggle joint and its slotted end fits over the pivot 24 of saidtoggle-joint member. While the plow is in the ground the spring 33presses upward against lug 29 of the foot lever, pressing the lower wallof the slot 27 against the pivot of the toggle joint member and exertingthrough extension 25 and member 21 a yielding pressure sufficient tohold the toggle members in alinement and thereby maintain a lock to holdthe plow in the ground. As the plow beam is raised the in 29 swingsbetween the swivel post 32 and the pivot 24 of the toggle joint, and thespring swings the foot lever until the opposite side of slot 27 comes incontact with the pivot 24. hen the plow is almost raised the catch 28 offoot lever 26 encounters stop 30 of bracket 35, the spring 33 yields topermit the catch to ride over the stop and as the raising of the plow iscompleted the catch engages the stop and the spring maintains theengagement.

In lowering the plow, initial pressure on the foot lever 26, exertedwhile lever 31 is held against motion, overcomes the tension of thespring and disengages the catch 28 from stop 30. Subsequently the twofoot levers move together to effect the lowering of the plow.

The roller 12 is employed for the reason that rolling friction isordinarily lighter than, sliding friction, but it is not indispensableto the operation of the plow-tilting lll(.(7ll:t1l.lSlll.

What I claim as new and desire to secure by Letters Patent is,

1. I11 a plow, the combination withafcarrying frame, a plow beam. and aplow attached to the beam; of a crank-lift for the beam, extendingforward when the plow is lowered, a stiff rearward and upward extension.of the beam resting on a [ixed bearing in the frame. while the plow isin operation and while it is rising, and means for holding the beamextension raised during a part of the plow-lowering action of thecrank-lift, substantially as described.

2. In a plow, the combination with a earrying frame a plow beam and a.plow attached to the beam of a crank-lift for the beam extendingapproxinmtely horizontally forward when the plow is lowered, a still'rearward and upward extension of the beam resting on a fixed bearing inthe frame while the plow is in operation and while it is rising and arocking support adapted to carry the beam extension forward and hold itraised during a part of the plow-lowering action of the crank-lift.

3. In a plow, the combination with a carrying frame a plow beam and aplow attached to the beam of a crank-lift for the beam extendingapproximately horizontally forward when the plow is lowered, a stiffrearward and upward extension of the beam resting on a fixed bearing inthe frame while the plow is in operation and while it is rising and anupward-extended rock arm adapted to catch the beam extension and carryit forward as the crank-lift lowers the plow toward an operativeposition.

4. In a plow, the combination with a carrying frame, a plow beam and aplow attached to the beam; of a crank-lift for the plow beam, a stiffrearward and upward extension of the beam normally resting on a fixedbearing in the frame, a pin in the 102- part of the beam extension andan upwardextended rock arm pivoted in the frame and having a notch inits front edge to engage the pm of the beam extension, substantially-asdescribed.

5. In a plow, the combination with a carrying frame, a plow beam and aplow attached to the beam; of a crank-lift for the plow beam, a stiffrearward and upward extension of .the beam normally resting on a fixedbearing in the frame, a pin in the rear part of the beam extension, anupward-extended rock arm pivoted in the frame and having a notch in itsfront edge adapted to '7 engage the pin of the beam extension when theplow is raised, and a spring pressing the upper end of the rock armforward, substantially as described.

6. In a plow, the combination with a carrying frame, a plow beam and aplow attached to the beam; of a crank-lift for the plow beam, a stiffupward and rearward extension of the beam normally resting on a fixedbearing in the frame, a pin in the rear part of the beam extension, anupward-extended rock arm pivoted in the frame and having a notch in itsfront edge to engage the pin of the beam extension when the plow israised, a spring pressing the rock arm toward the pin of the beamextension and a stop to disengage the arm from the pin as the plowapproaches its lowest position, substantially as described.

7. In a plow, the combination with a car rying frame, a plow beam and aplow attached to the beam; of a swinging lift for the front part of theplow beam, an incline to raise the rear part of the beam, and a rockingcatch to hold the rear part of the beam raised during part of thelowering motion of the front part of the beam substantially asdescribed.

8. In a plow, the combination with a carrying frame, a plow, a plow beamand a beamlifting bail; of an arm attached to the bail, a toggle jointjournaled at one end on the frame and connected at the other end withthe arm of the bail, a depressing lever pivotally connected with anextension of the journaled member of the toggle joint and having alimited amount of swing thereon, and a spring connecting with thedepressing lever and pressing lengthwise thereof when the lever isapproximately half way between its extreme positions, substantially asdescribed.

9. In a plow, the combination with a carrying frame, a plow, a plow beamand a beamlifting bail a toggle joint journaled at one end on the frameand connected at the other end with the bail arm, a depressing leverpivotally connected with an extension of the journaled member of thetoggle joint and having a limited amount of swing thereon, a springconnecting with the depressing lever and pressing lengthwise thereofwhen the lever is about midway between extremes of travel, and a catchon the lift lever adapted to engage a stop on the frame when the bail israised, substantially as described.

10. In a plow, the combination with a carrying frame, a plow, a plowbeam and a beamlifting bail; of a lift lever rigid with the journaledend of the toggle joint, a depressing lever pivotally connected with anextension of the j ournaled end of the toggle joint and having a limitedamount of swing thereon, a spring connecting with the depressing leverand pressing lengthwise thereof when the said lever is about midwaybetween extremes of travel, and a catch on said depressing lever adaptedto engage a stop on the frame when the bail is raised, substantially asdescribed.

In testimony whereof I sign my name in the presence of two subscribingwitnesses.

WILLIAM S. GRAHAM. Witnesses G. H. WASON, H. MAU.

